There was once an undersea post office in the Bahamas.
241
Two dogs were among the Titanic survivors.
262
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Water is actually naturally blue.
48
Sharks, like other fish, have their reproductive organs in their chests.
248